MINEBK00509

• County: Lake
• Volume: 17
• Document: Inspectr
• Suffix: A

Fro tPa -hates the br y n matoi•ial is drab - ~~~
a _ _ m off in the ?~1?
regulation hand mine car and then ran to the shaft and hoisted '~~
by meane~of s cage. '~'~
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The method of timbering used is square sets with filled ' 1
cribs at regular intervals in heavy swelling ground. ~ ~ I~!
PUMPIAG PLANT.
The pumping plant at the Penrose Shaft consists of tyro
electrically driven centrifugal pampa, working in compartments
' on each side of the hoisting compartment of the shaft.
The pumps are hung in the compartment on cables which pass ,i•'
over blacks and thence to winches vrhich allows of the pumps
'I being raised or lowered at will, a telescope 1oint in the main
' rater line allows of coneidorable change in position of the ~~( ~r~! ;+ ' ~~ I
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pumps being made. They were designed by the Providence •I4
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Enpireoring Ylorks of Providence, R.I., and are marked Providenae ~ ~i
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' Pump Type 2 S $ C. P. D 23; They are designed to handle 1500 j, . ~ i'
~
eallone per minute against a head oP 9G0 feet and running at ~ 1
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111'
the rate of 1786 r evolutions per minute; but the onpaaity has I {~'~ Ali
' been increased to about 2300 gal. per minute, at the Penrose ~ ' ,!{IA ?A,
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by increasing the speed and by submerging the pumps themselves
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to the point of contest oP the pampa and motors which drive
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them. The pampa
are vertical, two Otago aentrifugal with 2

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bronze impellers, 1$ inches in diameter. I ;
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The disahar e
o enin a in the im oilers are 1 1 9 inches

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b 2 3 $ inahes8
Y / Tha suction and dischnr a nro both $ inches
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while the main water column ie 10 inaheo in dinmster. The ~ ~ ' ~
Pumps and rotors stand in a atsol frame with the.motors ~ ~ '
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dieoctly above the pumps and oonneotsd to them by a flexible
Pin drive. The pin drive aonsista of 0 - 1 1/2 inoh pine
set on a diso on the motor shaft vrhiah ongagan a 13 inoh wheel,
containing x•ound hobo to fit the pine. Rnch pin is oovered
with a rut~ber roller to absorb the shook. 'Pha pumps nra
water peaked anfl water lubricated throup~out. ~i "~
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The motors are Type 1, Claea 4r 300 Ii.P., Porm K, 80 Oyolea, ~ ~
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A•u•P. 270, Volta 860, Speed 1000 A. P,M, No, loud 1786 A. P,M. r ~,
C II
' full load. ~~ '
The tranomiasion oable which extends dawn the ohnft to the I ~ it
motors on the pumps Ss en Smmense affair, weiphinp, several paunda